An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Witham MD, Fulton RL, Greig CA, Johnston DW, Lang CC, van der Pol M, Boyers D, Struthers AD, McMurdo ME.Witham MD, et al. Among authors: mcmurdo me.Circ Heart Fail. 2012 Mar 1;5(2):209-16. doi: 10.1161/CIRCHEARTFAILURE.111.963132. Epub 2012 Jan 23.Circ Heart Fail. 2012.PMID: 22271753Clinical Trial.